Grating and display panel alignment and lamination method and display device

Abstract

The present invention provides a method for aligning and laminating a grating to a display panel and a display device. The method includes: bonding a grating to the surface of a glass plate to form a composite glass; placing the composite glass on a display panel for alignment and marking; cutting the marked composite glass; and aligning and laminating the cut composite glass to the display panel, wherein the glass plate is positioned between the grating and the display panel. Laminating the grating to the glass plate first avoids wrinkling of the grating during the alignment and lamination process, thereby improving the display quality of the device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a method for aligning and laminating a grating and a display panel, and a display device. Background Art

[0002] In the prior art, 3D display can be achieved by laminating a glass layer to a display panel and then attaching a grating to the glass layer. However, during the lamination process, the adhesive layer between the display panel and the glass layer is prone to uneven thickness, which is not conducive to assembly and can cause the entire device to bend and deform, affecting the display effect. In addition, during the grating alignment and lamination process, multiple horizontal movements or rotations are required to ensure good alignment between the display panel and the grating. During this process, the adhesive layer between the grating and the glass layer is also prone to uneven thickness, resulting in grating wrinkles, increasing device crosstalk and increasing the viewing distance, seriously affecting the viewing distance and the maximum depth of field entering / exiting the screen.

[0003] Therefore, the current method for aligning and laminating the grating and the display panel and the display device still need to be improved. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. In one aspect, the present invention provides a method for aligning and laminating a grating to a display panel. The method comprises: bonding a grating to the surface of a glass plate to obtain a composite glass; aligning the composite glass on a display panel to mark the composite glass; cutting the marked composite glass; and aligning and laminating the cut composite glass to the display panel, wherein the glass plate is positioned between the grating and the display panel. Thus, by first laminating the grating to the glass plate, wrinkles in the grating during the alignment and lamination process can be avoided, thereby improving the display quality of the device.

[0005] According to an embodiment of the present invention, a method for aligning and laminating the cut composite glass to the display panel includes applying a hot-melt optically clear adhesive or spraying a hyperbranched UV-curable resin powder on the surfaces where the display panel and the composite glass are to be aligned. Thus, laminating the display panel and the composite glass using the hot-melt optically clear adhesive or hyperbranched UV-curable resin facilitates forming a uniform adhesive layer, thereby further improving the display quality of the device.

[0006] According to an embodiment of the present invention, the method for aligning and bonding the cut composite glass to the display panel includes: affixing the hot-melt optically transparent adhesive to the surface where the display panel and the composite glass are to be aligned and bonded; placing the display panel with the hot-melt optically transparent adhesive bonded thereto in a vacuum bonding device; heating the hot-melt optically transparent adhesive to melt and level the hot-melt optically transparent adhesive; aligning and bonding the composite glass to the side of the hot-melt optically transparent adhesive away from the display panel; and cooling the melted hot-melt optically transparent adhesive to solidify the hot-melt optically transparent adhesive. Thus, the bonding performance of the hot-melt optically transparent adhesive can be improved, ensuring a firm bond between the display panel and the glass plate. Furthermore, the alignment and bonding of the grating and the display panel is performed while the hot-melt optically transparent adhesive is in a molten state, facilitating good alignment and bonding. Furthermore, the adhesive layer between the glass plate and the display panel has a uniform thickness, which is beneficial for further improving the display effect of the device.

[0007] According to an embodiment of the present invention, when the composite glass is aligned and bonded to the side of the hot-melt optically transparent adhesive away from the display panel, the pressure of the vacuum bonding device is 10 Pa to 1000 Pa. This is more conducive to achieving alignment and bonding of the grating and the display panel.

[0008] According to an embodiment of the present invention, the hot melt optically clear adhesive includes a UV curable resin at a mass fraction of 1% to 10% based on the total mass of the hot melt optically clear adhesive. This can further improve the adhesive properties of the hot melt optically clear adhesive, thereby further enhancing the bonding strength between the glass sheet and the display panel.

[0009] According to an embodiment of the present invention, the method for aligning and bonding the cut composite glass to the display panel includes: spraying the hyperbranched UV curable resin powder on the surface of the display panel and the composite glass to be aligned; irradiating the hyperbranched UV curable resin powder with infrared light to melt and level the hyperbranched UV curable resin powder; placing the display panel in a vacuum bonding device, wherein the temperature of the vacuum bonding device is set to 70°C to 75°C; aligning and bonding the composite glass to the side of the melted hyperbranched UV resin powder away from the display panel; and irradiating the melted hyperbranched UV curable resin powder with ultraviolet light to solidify the melted hyperbranched UV curable resin powder. In this way, alignment and bonding of the grating and the display panel can also be achieved. Moreover, the above method can make the thickness of the adhesive layer between the glass plate and the display panel uniform, and the glass plate and the display panel are firmly bonded, which is conducive to further improving the display effect of the device.

[0010] According to an embodiment of the present invention, the hyperbranched UV curable resin comprises: 89% to 93% by weight of a hyperbranched polyester terminal-modified resin; 1% to 2% by weight of a photoinitiator; and 5% to 10% by weight of a defoamer. As a result, the hyperbranched UV curable resin can rapidly melt and level under infrared light irradiation. After melting, it can be rapidly cured by ultraviolet light irradiation. Using a mixture of these components to bond a glass plate to a display panel facilitates alignment and bonding of the grating and display panel, and can form a uniformly thick adhesive layer, further enhancing the display effect of the device.

[0011] According to an embodiment of the present invention, the photoinitiator is a mixture of photoinitiator 2959 and photoinitiator 819, with the mass ratio of photoinitiator 2959 to photoinitiator 819 being 1:4 to 3:2; and / or the defoaming agent is BYK-088. This helps further enhance the display effect of the device.

[0012] According to an embodiment of the present invention, the grating is pre-cut before being bonded to one surface of the glass plate, wherein the angle between at least one cutting line and the width direction of the grating is 6° to 16°. This allows the cut grating to be adapted for sub-pixels of various shapes, thereby achieving better display performance.

[0013] According to an embodiment of the present invention, before aligning and marking the composite glass, the edge of the glass sheet extends beyond the edge of the grating, and the minimum distance between the edge of the orthographic projection of the grating on the glass sheet and the edge of the glass sheet is 1 cm to 5 cm. Before cutting the composite glass, the dimensions of the glass sheet extend beyond the dimensions of the grating, facilitating marking and cutting of the composite glass to obtain the desired grating dimensions.

[0014] In another aspect, the present invention provides a display device obtained by the aforementioned method. Thus, the display device has all the features and advantages of the aforementioned method, which will not be further elaborated here. In general, the display device has a good display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A flow chart of a method for aligning and laminating a grating and a display panel according to an embodiment of the present invention is shown;

[0016] Figure 2 A schematic structural diagram of a composite glass according to an embodiment of the present invention is shown;

[0017] Figure 3A flow chart of a method for attaching a first adhesive layer to a surface of a grating according to an embodiment of the present invention is shown;

[0018] Figure 4 shows a schematic diagram of cropping a grating according to one embodiment of the present invention;

[0019] Figure 5 A schematic diagram showing bonding a grating to one surface of a glass plate according to one embodiment of the present invention is shown;

[0020] Figure 6 A schematic structural diagram of a composite glass according to another embodiment of the present invention is shown;

[0021] Figure 7 A schematic diagram showing a method of placing a composite glass on a display panel for alignment according to one embodiment of the present invention is shown;

[0022] Figure 8 A schematic diagram of the structure of a composite glass with cutting lines marked thereon according to one embodiment of the present invention is shown;

[0023] Figure 9 shows a schematic structural diagram of a display device according to an embodiment of the present invention;

[0024] Figure 10 Shows a schematic diagram of applying hot melt optically clear adhesive according to one embodiment of the present invention;

[0025] Figure 11 shows a schematic diagram of spraying hyperbranched UV curable resin powder according to one embodiment of the present invention;

[0026] Figure 12 A schematic diagram showing infrared light irradiation treatment of hyperbranched UV-curable resin powder according to one embodiment of the present invention is shown;

[0027] Figure 13 A schematic diagram showing ultraviolet irradiation treatment of melted hyperbranched UV curable resin powder according to one embodiment of the present invention is shown;

[0028] Figure 14 The structural formula of the first generation of hyperbranched polyester terminal modified resin is shown;

[0029] Figure 15 The structural formula of the second generation hyperbranched polyester terminal modified resin is shown;

[0030] Figure 16 The structural formula of the third generation hyperbranched polyester terminal-modified resin is shown.

[0031] Description of reference numerals:

[0032] 100: grating; 200: glass plate; 300: display panel; 10: first adhesive layer; 20: release film; 30: cutting line; 40: first adhesive stick; 50: second adhesive layer; 50': hot-melt optically clear adhesive; 50": hyperbranched UV-curable resin powder; 50'': melted hyperbranched UV-curable resin powder; 60: second adhesive stick; 70: electrostatic spray gun. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0034] In one aspect of the present invention, a method for aligning and laminating a grating and a display panel is provided. Figure 1 The method for aligning and laminating the grating and the display panel may include the following steps:

[0035] S100: bonding the grating to the surface of the glass plate to obtain composite glass.

[0036] In this step, the grating is bonded to the surface of the glass plate to obtain a composite glass. Figure 2 The composite glass may include a grating 100, a first adhesive layer 10, and a glass plate 200. The first adhesive layer 10 has a certain degree of adhesiveness, and is used to bond the grating 100 and the glass plate 200. According to an embodiment of the present invention, the first adhesive layer 10 may be a double-sided adhesive tape, and the specific thickness is not particularly limited. Those skilled in the art can select it according to actual design requirements.

[0037] According to some embodiments of the present invention, before bonding the grating 100 to one side surface of the glass plate 200, a first adhesive layer 10 may be bonded to one surface of the grating 100. Figure 3 As shown, the first adhesive layer 10 is provided with a release film 20 on the side away from the grating 100 for easy pasting; then, the grating 100 with the first adhesive layer 10 pasted on the surface is cut, as shown in FIG. Figure 4 As shown, the grating 100 may include a plurality of parallel arranged lenses or prisms, the lenses or prisms extending along the Y direction, and according to some embodiments of the present invention, the grating 100 may include a plurality of parallel arranged lenses or prisms extending along the Y direction. Figure 4The grating is cut into the smaller rectangle shown in , wherein the angle a between at least one of the cutting lines (cutting line 30) and the width direction (Y direction) of the grating 100 is 6° to 16°. For example, the angle a between the cutting line 30 and the width direction of the grating 100 can be 6°, 8°, 10°, 13°, 15°, 16°, etc., thereby making the cut grating suitable for sub-pixels of various shapes, facilitating the improvement of the display effect of the device (or display equipment), and being able to remove moiré patterns, thereby further improving the display effect of the device (or display equipment). It should be noted that, as Figure 4 As shown, the four cutting lines form a rectangle, the two opposite cutting lines are parallel to each other, and the two adjacent cutting lines are perpendicular to each other, wherein the acute angle a between the cutting line 30 and the cutting line opposite to it and the width direction of the grating is 6° to 16°, and the sum of the acute angles a between the other two cutting lines and the width direction of the grating is 90°.

[0038] According to some embodiments of the present invention, after the grating is cut, the release film 20 on the side of the first adhesive layer 10 away from the grating 100 is removed. Figure 5 The first glue stick 40 can be used to evenly bond the cut grating 100 to one surface of the glass plate 200 to obtain a composite glass. The structure of the composite glass can be referred to Figure 2 and Figure 6 .

[0039] According to an embodiment of the present invention, referring to Figure 2 and Figure 6 Before the composite glass is aligned and marked, the edge of the glass plate 200 exceeds the edge of the grating 100, and the minimum distance d between the edge of the orthographic projection of the grating 100 on the glass plate 200 and the edge of the glass plate 200 can be 1cm to 5cm, for example, d can be 1cm, 2cm, 3cm, 4cm, 5cm, etc. In this way, the alignment of the composite glass and the display panel can be facilitated, and after alignment, the composite glass can be marked, and then the composite glass can be cut so that the size of the composite glass (including the grating 100) meets the required size requirements. It should be noted that the minimum distance d between the edge of the orthographic projection of the grating 100 on the glass plate 200 and the edge of the glass plate 200 refers to the distance between one side edge of the grating 100 and the corresponding side edge of the glass plate 200, such as Figure 2 and Figure 6 shown.

[0040] S200: placing the composite glass on the display panel for alignment, so as to mark the composite glass.

[0041] In this step, a display panel 300 is provided, referring to Figure 7The composite glass is placed on the display panel 300 for alignment, so that the location of the cutting line can be confirmed according to the design requirements. The composite glass is marked to facilitate the subsequent cutting of the grating 100 and the glass plate 200. The display panel can be a 2D display panel, and 3D stereoscopic display can be achieved by combining it with the grating and the glass plate.

[0042] According to some embodiments of the present invention, the display panel can be lit and an alignment picture can be input, and then the composite glass can be placed on the display panel for alignment. According to some specific embodiments of the present invention, an alignment picture can be provided, the display panel can be lit and the alignment picture can be input into the display panel, and the composite glass can be placed on the display panel. The alignment can be performed by adjusting the tilt angle and position of the grating in the composite glass. After the alignment picture is controlled by the grating, different views can be displayed at different positions (to achieve the desired display effect), that is, the 3D image can be displayed normally, and the alignment operation can be considered to be completed. According to an embodiment of the present invention, refer to Figure 8 , the alignment image can be slightly smaller than the size of the grating 200. After alignment, mark the composite glass, such as Figure 8 The composite glass can then be cut along the marked cutting lines. It should be noted that marking can be performed based on the lamination process requirements for the grating, glass plate, and display panel. For example, the length of the glass plate can be slightly larger than the length of the display panel (e.g., 2mm), and the width of the glass plate can be slightly larger than the width of the display panel (e.g., 2mm). Alternatively, the length of the glass plate can be slightly smaller than the length of the display panel (e.g., 2mm), and the width of the glass plate can be slightly smaller than the width of the display panel (e.g., 2mm). Marking can be performed based on different lamination process requirements, and cutting can be performed subsequently.

[0043] It should be noted that for display devices (or display equipment) of different sizes and different display requirements, the alignment image used in the alignment operation can be specifically designed according to the size and display requirements of the specific display device (or display equipment) using the 3D display layout design and layout method. The present invention does not specifically limit the alignment image, as long as the alignment image can match the specific design of the display device (or display equipment), and the alignment operation between the grating and the display panel can be completed using the alignment image.

[0044] S300: Cutting the marked composite glass.

[0045] After the alignment and marking operations between the composite glass and the display panel are completed, the composite glass is cut. Figure 8 After marking the cutting line, the composite glass can be cut to obtain composite glass that meets the size requirements.

[0046] According to some embodiments of the present invention, after the composite glass is cut, the cut composite glass may be edge-grinded to remove burrs that may be generated during the cutting process and make the side edges of the composite glass smoother.

[0047] S400: Aligning and laminating the cut composite glass to the display panel.

[0048] After the composite glass is cut to meet the required size, the cut composite glass is aligned and bonded to the display panel to obtain a display device (or display equipment), wherein the glass plate 200 is arranged between the grating 100 and the display panel 300. Figure 9 shown.

[0049] In the present invention, hot-melt optically transparent adhesive or hyperbranched UV resin may be used to bond the composite glass and the display panel, which will be described in detail below.

[0050] According to some embodiments of the present invention, a method for aligning and bonding the cut composite glass to the display panel using hot-melt optically transparent adhesive may include the following steps: affixing the hot-melt optically transparent adhesive to the surfaces of the display panel 300 and the composite glass 200 where they are aligned and bonded, placing the display panel 300 with the hot-melt optically transparent adhesive bonded in a vacuum bonding device, heating the hot-melt optically transparent adhesive at 80°C to 100°C (for example, 80°C, 85°C, 90°C, 95°C, 100°C) to melt and level the hot-melt optically transparent adhesive, then aligning and bonding the composite glass to the side of the hot-melt optically transparent adhesive away from the display panel, cooling the hot-melt optically transparent adhesive to solidify the hot-melt optically transparent adhesive, and completing the alignment and bonding of the grating and the display panel. Hot-melt optically transparent adhesive is a film layer with controllable thickness. It is used to bond composite glass and display panels. Heating and melting the adhesive and then curing it significantly improves the adhesive's bonding properties, resulting in a second adhesive layer 50 with good adhesion, which can firmly bond the composite glass and display panel. Furthermore, after heating and melting, the hot-melt optically transparent adhesive has high viscosity and poor fluidity. After curing, a second adhesive layer 50 of uniform thickness is obtained, thereby avoiding problems such as bending deformation and poor display effects caused by uneven adhesive layer thickness. After alignment and bonding, the adhesive layer achieves excellent flatness and controllable thickness, which not only reduces crosstalk, improves viewing angle and depth, but also precisely controls the optimal viewing distance. The hot-melt optically transparent adhesive has high viscosity after heating and melting. According to some embodiments of the present invention, a leveling time of 1-10 minutes is typically required.

[0051] According to some specific embodiments of the present invention, the release film on one side of the selected hot melt optical transparent adhesive 50' can be torn off, and the release film 20 on the other side can be retained. Figure 10, the hot-melt optically transparent adhesive 50' is pasted on the color film substrate (or upper polarizer, the upper polarizer can be a high-temperature resistant polarizer) of the display panel (the color film substrate or the upper polarizer is not shown in the figure) through the second adhesive roller 60 of the mounting machine, so that the hot-melt optically transparent adhesive 50' covers the surface of the color film substrate (or the upper polarizer), and the release film 20 on the other side of the hot-melt optically transparent adhesive 50' is torn off; then, the display panel pasted with the hot-melt optically transparent adhesive is placed in a vacuum bonding device at a constant temperature of 80° for 10 minutes to allow the hot-melt optically transparent adhesive to completely melt and level; then, the composite glass is placed in the vacuum bonding device and aligned with the display panel. Specifically, the vacuum bonding device is turned on, vacuumed, and the pressure of the vacuum bonding device is 10Pa to 1000Pa. Alignment bonding is performed, the display panel can be lit and an alignment picture can be input, and then the composite glass is placed on the display panel for alignment. According to some specific embodiments of the present invention, a registration picture can be provided (the registration picture can be the same as the registration picture used for the alignment operation in step S200), the display panel is lit and the registration picture is input into the display panel, the composite glass is placed on the display panel, and the registration is performed by adjusting the tilt angle and position of the grating in the composite glass. After the registration picture is controlled by the grating, different views can be displayed at different positions (to achieve the desired display effect), that is, the 3D image can be displayed normally, and the registration operation can be considered completed. Afterwards, the bubbles are removed for 1-10 minutes, and the melted hot-melt optical transparent adhesive is cooled to solidify the hot-melt optical transparent adhesive. After the vacuum is removed, the bonding is completed.

[0052] According to other specific embodiments of the present invention, a certain amount of UV curable resin may be added to the hot melt optically transparent adhesive. Based on the total mass of the hot melt optically transparent adhesive, the hot melt optically transparent adhesive may include a UV curable resin in a mass fraction of 1% to 10% (e.g., 1%, 3%, 5%, 8%, 10%, etc.). During the preparation process of the hot melt optically transparent adhesive, the UV curable resin component is added in the above mass fraction. The resulting hot melt optically transparent adhesive is still a film material with controllable thickness. After degassing, the hot melt optically transparent adhesive is further subjected to a UV light irradiation step during the cooling process to break double bonds in the UV curable resin to form single bonds, thereby further improving the bonding performance of the hot melt optically transparent adhesive, increasing the bonding strength between the display panel and the composite glass, and improving the overall stability of the display device (or display equipment). Moreover, the addition of the above amount of UV curable resin makes it difficult to generate stress in the adhesive layer obtained after curing. Even if stress exists, the stress is uniform and does not adversely affect the stability of the display device (or display equipment).

[0053] According to some other embodiments of the present invention, a hyperbranched UV resin may be used to bond the composite glass to the display panel. According to some embodiments of the present invention, the method for aligning and bonding the cut composite glass to the display panel may include the following steps: spraying hyperbranched UV curing resin powder on the surface where the display panel and the composite glass are aligned and bonded, Figure 11 , an electrostatic spray gun 70 can be used for spraying, and the electrostatic spray gun 70 can generate static electricity on the surface of the display panel. At the same time, static electricity is also generated on the surface of the hyperbranched UV resin powder 50", so that the resin powder is evenly sprayed on the surface of the display panel; Figure 12 , irradiate the hyperbranched UV curing resin powder 50" with infrared light (IR) to melt and level the hyperbranched UV curing resin powder 50", then place the display panel in a vacuum bonding device, the temperature of the vacuum bonding device can be set to 70℃~75℃ to keep the resin in a melted state, and align the composite glass with the side of the melted hyperbranched UV resin powder away from the display panel, with reference to Figure 13 The melted hyperbranched UV curable resin powder 50'' is irradiated with ultraviolet light (UV) to cure the melted hyperbranched UV curable resin powder 50'', thereby completing the alignment and bonding of the grating and the display panel. Thus, a second adhesive layer with uniform thickness can also be formed between the composite glass and the display panel, and the second adhesive layer has high viscosity and can firmly bond the composite glass and the display panel. The hyperbranched UV curing resin component is environmentally friendly and contains no harmful volatile substances, and will not cause adverse effects on the environment or human body during operation. After the hyperbranched UV curing resin is melted, there is no volatile substance, which makes the vacuum degree of the bonding process lower, and it is not easy to generate bonding bubbles, and the yield rate is high. In addition, the hyperbranched UV curing resin can be melted and leveled at a lower temperature. By using infrared light to raise the resin temperature to 70°C to 75°C, the hyperbranched UV curing resin can be melted and leveled in a short time, only about 10s to 1min. After melting, the viscosity is very low, it is easy to level, and the liquid layer is very thin, which is beneficial to improving the flatness of the display panel and the composite glass after bonding, not easy to bend, and has high flatness, so that the crosstalk low viewing angle is improved. After alignment, it can be quickly cured by ultraviolet light irradiation.

[0054] According to some embodiments of the present invention, the hyperbranched UV curable resin may include a hyperbranched polyester terminal modified resin with a mass fraction of 89wt% to 93wt%, a photoinitiator with a mass fraction of 1wt% to 2wt%, and a defoamer with a mass fraction of 5wt% to 10%. Wherein, based on the total mass of the hyperbranched UV curable resin, the mass fraction of the hyperbranched polyester terminal modified resin may be 89wt%, 90wt%, 91wt%, 92wt%, 93wt%, etc., the mass fraction of the photoinitiator may be 1wt%, 1.2wt%, 1.5wt%, 1.8wt%, 2wt%, etc., and the mass fraction of the defoamer may be 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 10%, etc. The hyperbranched UV curable resin of the above components can quickly melt and level under the condition of infrared light irradiation, and after melting, it can also be quickly cured by ultraviolet light irradiation to obtain a second adhesive layer with uniform thickness and good bonding performance. It should be noted that the hyperbranched polyester terminal-modified resin refers to a single molecule of polyhydric alcohol (such as pentaerythritol) combined with a molecule containing one carboxyl group and multiple hydroxyl groups, and the multiple hydroxyl groups of the single molecule of polyhydric alcohol respectively undergo polymerization reaction with the carboxyl groups of a molecule containing one carboxyl group and multiple hydroxyl groups to form esters, thereby obtaining the first generation hyperbranched polyester terminal-modified resin; the multiple hydroxyl groups of the first generation hyperbranched polyester terminal-modified resin can continue to undergo polymerization reaction with the carboxyl groups of a molecule containing one carboxyl group and multiple hydroxyl groups to form esters, thereby obtaining the second generation hyperbranched polyester terminal-modified resin; the multiple hydroxyl groups of the second generation hyperbranched polyester terminal-modified resin can also continue to undergo polymerization reaction with the carboxyl groups of a molecule containing one carboxyl group and multiple hydroxyl groups to form esters, thereby obtaining the third generation hyperbranched polyester terminal-modified resin; and so on, ..., to obtain the Nth generation hyperbranched polyester terminal-modified resin.

[0055] According to some embodiments of the present invention, the hyperbranched polyester terminal modified resin may be a first generation hyperbranched polyester terminal modified resin having a melting point of 71.2° C. and a structural formula as follows: Figure 10 According to some other embodiments of the present invention, the hyperbranched polyester terminal modified resin may be a second generation hyperbranched polyester terminal modified resin having a melting point of 74.6°C and a structural formula as shown Figure 11 According to some other embodiments of the present invention, the hyperbranched polyester terminal modified resin may be a third generation hyperbranched polyester terminal modified resin having a melting point of 75.3°C and a structural formula as shown Figure 12 According to some other embodiments of the present invention, the hyperbranched polyester terminal-modified resin can also be composed of two or three of the first generation hyperbranched polyester terminal-modified resin, the second generation hyperbranched polyester terminal-modified resin, and the third generation hyperbranched polyester terminal-modified resin. The above hyperbranched polyester terminal-modified resins can all be melted at a relatively low temperature, and the melted hyperbranched polyester terminal-modified resin can be cured under ultraviolet light irradiation to form a glue layer with high bonding strength.

[0056] According to some embodiments of the present invention, the photoinitiator used in the hyperbranched UV curable resin can be a mixture of photoinitiator 2959 and photoinitiator 819, thereby enabling the melted resin to cure rapidly under ultraviolet light irradiation conditions. According to some specific embodiments of the present invention, the photoinitiator used in the hyperbranched UV curable resin can be a mixture of photoinitiator 2959 and photoinitiator 819, wherein the mass ratio of photoinitiator 2959 to photoinitiator 819 is 1:4 to 3:2; for example, the mass ratio of photoinitiator 2959 to photoinitiator 819 can be 1:4, 3:7, 2:3, 1:1, 3:2, etc., thereby further improving the bonding performance of the hyperbranched UV curable resin and enabling the formation of a uniformly thick adhesive layer between the composite glass and the display panel.

[0057] According to some specific embodiments of the present invention, the defoaming agent used in the hyperbranched UV curing resin may be BYK-088, which is beneficial for removing bubbles during alignment and bonding, and makes the cured adhesive layer have better density.

[0058] According to some specific embodiments of the present invention, the specific steps of bonding the composite glass and the display panel using a hyperbranched UV curing resin are as follows: the second-generation hyperbranched polyester terminal modified resin, photoinitiator and defoaming agent in the hyperbranched UV curing resin are mixed according to a ratio, and after mixing evenly, the mixed powder is placed in an electrostatic spray gun, and the resin powder is evenly sprayed on the surface of the display panel using the electrostatic spray gun, and the resin powder is irradiated with an infrared lamp to quickly melt and level it. After that, the display panel is placed in a vacuum bonding device with an internal temperature of 70°, the composite glass is placed in the vacuum bonding device, and vacuum is applied. When the pressure of the vacuum bonding device reaches 10Pa~1000Pa, alignment bonding is performed, the display panel can be lit and an alignment picture can be input, and then the composite glass is placed on the display panel for alignment. According to more specific embodiments of the present invention, alignment picture (this alignment picture can be identical with the alignment picture used for alignment operation in step S200) can be provided, display panel is lit and input this alignment picture into display panel, composite glass is placed on display panel, alignment is carried out by adjusting the angle of inclination and the position of the grating in the composite glass, after alignment picture is controlled light by grating, different views (reaching required display effect) can be demonstrated in different positions, namely 3D image can be normally displayed, then it can be considered that alignment operation has been completed, afterwards, de-bubble 1-10 minute, the hyperbranched UV curing resin melted by ultraviolet irradiation, so that the hyperbranched UV curing resin melted is solidified, and laminating is completed after de-vacuuming. According to other specific embodiments of the present invention, in the process of adopting hyperbranched UV curing resin to carry out alignment lamination, if temperature reduction causes being difficult to alignment, infrared lamp irradiation can be adopted, so that alignment is carried out.

[0059] In another aspect of the present invention, the present invention provides a display device, which is obtained by the above method, such as Figure 9 As shown, the display device includes a grating 100, a glass plate 200, and a display panel 300. The grating 100 and the glass plate 200 are bonded together by a first adhesive layer 10, and the glass plate 200 and the display panel 300 are bonded together by a second adhesive layer 50. This display device possesses all the features and advantages of the previously described method for aligning and laminating a grating to a display panel, and will not be further elaborated here. In general, in this display device, the first and second adhesive layers have uniform thicknesses, and they securely bond the grating, the glass plate, and the display panel, resulting in an excellent 3D display effect and good overall stability.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0061] In the description of this specification, the reference terms "one embodiment", "another embodiment", "some embodiments", "some specific embodiments" or "some other specific embodiments" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0062] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for aligning and laminating a grating and a display panel, characterized in that: include: Bonding the grating to the surface of the glass plate to obtain composite glass; placing the composite glass on a display panel for alignment to mark the composite glass; cutting the marked composite glass; Aligning and laminating the cut composite glass to the display panel, wherein the glass plate is arranged between the grating and the display panel; The method for aligning and laminating the cut composite glass to the display panel includes: Spraying hyperbranched UV curable resin powder on the surface where the display panel and the composite glass are aligned and bonded; irradiating the hyperbranched UV curable resin powder with infrared light to melt and level the hyperbranched UV curable resin powder; Placing the display panel in a vacuum laminating device, wherein the temperature of the vacuum laminating device is set to 70° C. to 75° C.; Aligning and laminating the composite glass to a side of the melted hyperbranched UV curable resin powder away from the display panel; The melted hyperbranched UV curable resin powder is irradiated with ultraviolet light to cure the melted hyperbranched UV curable resin powder.

2. The method according to claim 1, characterized in that The hyperbranched UV curable resin comprises: A hyperbranched polyester terminal-modified resin having a mass fraction of 89 wt% to 93 wt%; A photoinitiator having a mass fraction of 1 wt% to 2 wt%; The mass fraction of the defoaming agent is 5wt% to 10%.

3. The method according to claim 2, characterized in that The photoinitiator is a mixture of photoinitiator 2959 and photoinitiator 819, and the mass ratio of the photoinitiator 2959 to the photoinitiator 819 is 1:4 to 3:2; And / or the defoaming agent is BYK-088.

4. The method according to claim 1, wherein Before bonding the grating to one side surface of the glass plate, the grating is pre-cut, wherein the angle between at least one cutting line and the width direction of the grating is 6° to 16°.

5. The method according to any one of claims 1 to 4, characterized in that Before aligning and marking the composite glass, the edge of the glass sheet exceeds the edge of the grating, and the minimum distance between the edge of the orthographic projection of the grating on the glass sheet and the edge of the glass sheet is 1 cm to 5 cm.

6. A display device, characterized in that: The display device is obtained by the method according to any one of claims 1 to 5.

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